I'm not sure what your problem is. ThatGuy gave their theory, you rebutted, they disagreed on the grounds that you may have misunderstood their theory in the first place. I'm inclined to agree with them. The commonly accepted theory of timelines in Chrono Trigger is that time traveling to the past creates a branching timeline. The "original" timeline ThatGuy is talking about, the one where Lavos eventually destroys the world, has no time travellers appearing (Crono and co. are still perceived to disappear from the point of view of anyone else), and thus Crono cannot possibly defend in the bridge in this timeline. If you have an alternate theory of time travel for the game, you should point that out first to avoid any misunderstandings.
As for everything else, I'm just doing my job as an admin. Your attitude is causing a disruption for the community. I'm not sure what was done to you. No one called you "a fucking idiot". If you have a grudge against any admins or users from when you were here before under your previous username, I suggest you drop it. That was years ago, and I certainly don't remember any of it.
If you think me or another user is breaking the rules, please, point it out to me. PM me if you want. We'll talk it out and work through it.
Keep this up though, and I will remove you.